Revise PCBA and Firmware for Alternate Microprocessor -- 2

Due to the microprocessor shortage, I can no longer source the processer for my PCBA. This means I can't manufacture my product. I need somebody to redesign the PCBA to support the new processor, and edit the firmware to accommodate the new processor. I will supply the Altium native PCB design and Arduino code. Deliverables will be the revised Altium PCB design, revised Arduino code, and a working prototype PCBA that was manufactured in a production environment. The original processor is an ATMEGA328P-AU. The new one is ATMEGA48A-PU. It is expected that you will possess the knowledge to ensure that the design is robust electronically by reviewing power and thermal design. Most likely if the new processor wattage is equal or less than the previous, it should be fine. If wattage is more, some review needs to be made. This product is urgent, so I need a freelancer that is proficient and confident.

Clear and concise English communication is necessary.